Istituto di Scienza e Tecnologie dell'Informazione     
Andrienko G., Andrienko N., Hurter C., Rinzivillo S., Wroebel S. Scalable analysis of movement data for extracting and exploring significant places. In: IEEE Transactions on Visualization and Computer Graphics, vol. 19 (7) pp. 1078 - 1094. IEEE, 2013.
Place-oriented analysis of movement data, i.e., recorded tracks of moving objects, includes finding places of interest in which certain types of movement events occur repeatedly and investigating the temporal distribution of event occurrences in these places and, possibly, other characteristics of the places and links between them. For this class of problems, we propose a visual analytics procedure consisting of four major steps: (1) event extraction from trajectories; (2) extraction of relevant places based on event clustering; (3) spatio-temporal aggregation of events or trajectories; (4) analysis of the aggregated data. All steps can be fulfilled in a scalable way with respect to the amount of the data under analysis; therefore, the procedure is not limited by the size of the computer's RAM and can be applied to very large datasets. We demonstrate the use of the procedure by example of two real-world problems requiring analysis at different spatial scales.
URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6361385
DOI: 10.1109/TVCG.2012.311
Subject Mobility data mining
Data visualization
Event detection
Interactive data exploration and discovery
Data and knowledge visualization
H.2.8 Database Applications

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